DAYS 1-5 (MARCH 22-26)
High pressure in eastern Canada provides dry but colder weather today and sets the stage for an early spring storm that will include snow. This will take place as low pressure moves off the Mid Atlantic Coast and tracks east northeastward near or just inside the 40/70 “benchmark” Monday night. There will be enough cold air in place for snow to dominate the first part of the storm (although it may start as rain initially in many coastal areas before some dynamic cooling drags down sufficiently cold air to flip it to snow. It will snow for the least amount of time over southeastern MA and RI where warmer air will be first to invade, and this snow-to-rain zone will progress north northwestward as the storm goes on, but will occur slowly enough so that measurable / plowable snow occurs in a fair amount of the I-95 belt northwestward, with highest amounts to occur in the higher elevations outside I-495 and north of I-90 (see details below on amounts). We’ll be in between systems on Tuesday, which probably will not see complete clearing, and then the next storm takes a similar track but in a slightly milder atmosphere for Wednesday. While I’m expecting some frozen precipitation to be involved in the second storm on Wednesday, I also expect more rain to be involved than the first system, so the snow should be more confined and have less impact than the first one. Thursday may be very much Tuesday as we again find ourselves between a departing low and another approaching low in an active pattern…
TODAY: Sunny. Highs 38-45. Wind N 5-15 MPH.
TONIGHT: Clear. Lows 28-35. Wind NE under 10 MPH.
MONDAY: Increasing cloudiness. Highs 38-45. Wind NE up to 10 MPH.
MONDAY NIGHT: Overcast. Snow/mix develops early then changes to rain but may remain snow/mix for longer away from coastal locations. Preliminary snowfall accumulation expectation: Coating-2 inches southeast of the I-95 belt, 2-4 inches I-95 belt and I-495 belt south of I-90, 4-6 inches I-495 belt north of I-90. Lows 28-35 evening, may rise slowly overnight. Wind NE 10-20 MPH.
TUESDAY: Cloudy start with mix/rain/drizzle/fog possible early, then breaking clouds. Highs 40-47. Wind N 5-15 MPH.
TUESDAY NIGHT: Cloudy. Lows 30-37. Wind NE up to 10 MPH.
WEDNESDAY: Overcast. Rain likely, except some mix/snow possible interior areas. Highs 35-42. Wind NE 10-20 MPH.
WEDNESDAY NIGHT: Cloudy. Areas of fog and drizzle. Temperatures rising into the 40s. Wind variable 5-15 MPH.
THURSDAY: Mostly cloudy. Temperatures steady in the 40s. Wind variable 5-15 MPH.
DAYS 6-10 (MARCH 27-31)
The next in a series of low pressure areas comes through the region March 27, but with a further north track and milder air resulting in rain showers. A follow up low pressure system a little further south brings a chance of rain for a portion of the March 28-29 weekend. Generally dry but cool weather followed this for the last couple days of March.
DAYS 11-15 (APRIL 1-5)
Current indications are for a tendency for high pressure in eastern Canada and a series of low pressure waves passing south of or over southern New England. This would be a cool and unsettled set-up.